B.C.'s Endangered Killer Whales Need Winter Chinook Salmon To Survive: Study

VANCOUVER — Endangered southern resident killer whales would have a much better chance of survival if chinook were in their hunting grounds during winter off the coast of British Columbia, a new study says.The whales expand their menu and the distance they travel as they forage for food from October to March in the waters off California up to Alaska, which leaves them with little energy, says the study published Wednesday in the scientific journal Plos One.Brad Hanson, a wildlife biologist